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Finding the Fourth Proportional to 385,630.40, 578,056.80 and 175,419.20

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Solution

The fourth proportional to 385,630.40, 578,056.80 and 175,419.20 is: 262,951.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,630.40 : 578,056.80 = 175,419.20 : x
  2. Step 2: Convert to fraction form
    385,630.40/578,056.80 = 175,419.20/x
  3. Step 3: Cross multiply
    385,630.40x = 578,056.80 × 175,419.20
  4. Step 4: Simplify right side
    385,630.40x = 101,402,261,410.56
  5. Step 5: Solve for x
    x = 101,402,261,410.56/385,630.40
  6. Step 6: Final answer
    x = 262,951.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.